3(x+7)=-9x-15

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Solution for 3(x+7)=-9x-15 equation: 



3(x+7)=-9x-15

We move all terms to the left:

3(x+7)-(-9x-15)=0

We multiply parentheses

3x-(-9x-15)+21=0

We get rid of parentheses

3x+9x+15+21=0

We add all the numbers together, and all the variables

12x+36=0

We move all terms containing x to the left, all other terms to the right

12x=-36

x=-36/12

x=-3

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